#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <cstdlib>
#include <cstdint>

using namespace std;

class Solution {
public:
    int strStr(string haystack, string needle) {
        cout << "hello word" << endl;
        return 0;
    }
};

int main(void)
{
    string s = "testztesttestaabbcxxxtetad";
    string t = "abb";
    Solution su;
    int result = su.strStr(s, t);
    // printf("result is %d\r\n", result);
    return 0;
}
